Twiddle Muff for people living with Dementia - Knitted by Thorne libraries Knit & Natter Group. Twiddlemuffs are a knitted hand muff with interesting bits and bobs attached inside and out. They have been designed and developed to provide simple stimulation for active hands, while promoting increased flexibility and brain stimulation. Many patients with dementia have found the Twiddlemuff reassuring and comforting.